Practice Pakistan's most useful MCQs for competitive exams

For an annual flood series arranged in descending order of magnitude, the return for a magnitude listed at position period m in a total data N is________________?

• (A)  N/(m+l)
• (B)  m/(N+l)
• (C)  m/N
• (D)  (N+l)/m

Answer

Submitted By :Ali Uppal

The peak of a 4 hour flood hydrograph is 240 m3/sec . If the rainfall excess is 80 mm and base flow which is constant is 40 m3/sec, then the peak of 4-hours unit hydrograph will be__________________?

• (A)  20 3/sec
• (B)  25 m3/sec
• (C)  30 m3/sec
• (D)  35 m3/sec

Answer

Submitted By :Ali Uppal

For a catchment area of 120 km2, the equilibrium discharge in m3/hour of an S-curve obtained by the summation of 6 hour unit hydro graph is_______________?

• (A)  0.2 x 106
• (B)  0.6 x 106
• (C)  2.4 xlO6
• (D)  7.2 xlO6

Answer

Submitted By :Ali Uppal

The shape of recession limb of a hydrograph depends upon________________?

• (A)  basin characteristics only
• (B)  storm characteristics only
• (C)  both (A) and (B)
• (D)  none of the above

Answer

Submitted By :Ali Uppal

Which of the following canal outlets maintains a constant discharge ?

• (A)  non-modular outlet
• (B)  flexible outlet
• (C)  rigid module
• (D)  none of the above

Answer

Submitted By :Ali Uppal

The drainage water intercepting the canal can be disposed of by passing the canal below the drainage in___________________?

• (A)  aqueduct and syphon aqueduct
• (B)  aqueduct and super passage
• (C)  super passage and canal syphon
• (D)  level crossing

Answer

Submitted By :Ali Uppal

The aqueduct or superpassage type of works are generally used when_______________?

• (A)  high flood drainage discharge is small
• (B)  high flood drainage discharge is large and short lived
• (C)  high flood drainage discharge is large and continues for a long time
• (D)  none of the above

Answer

Submitted By :Ali Uppal

Tortuosity of a meandering river is the ratio of__________________?

• (A)  meander belt to meander length
• (B)  meander length to meander belt
• (C)  curved length along the channel to the direct axial length of the river reach
• (D)  direct axial length of the river reach to curved length along the channel

Answer

Submitted By :Ali Uppal

The main cause of meandering is________________?

• (A)  presence of an excessive bed slope in the river
• (B)  degradation
• (C)  the extra turbulence generated by the excess of river sediment during floods
• (D)  none of the above

Answer

Submitted By :Ali Uppal

A river training work is generally required when the river is_______________?

• (A)  aggrading type
• (B)  degrading type
• (C)  meandering type
• (D)  both (A) and (B)

Answer

Submitted By :Ali Uppal